Ida 7 integration + minor fixes (#37)

* minor fix to makel bap plugins woth with IDA 7

* few fixes to increase robustness

README.md

@@ -45,7 +45,7 @@ disassembly and decompilation views.
 BAP has the ability to tag a lot of possible attributes to
 instructions. These BIR attributes can be tagged automatically as
 comments in IDA, by running arbitrary plugins in BAP. Just hit
-`Ctrl+S`.
+`Shift+S`.
 
 Here's an example of output for Saluki showing that a certain malloc
 is unchecked (pointing to a potential vulnerability).
@@ -68,7 +68,7 @@ to the attribute location by selecting it.
 ### BAP Task Manager and Viewer
 
 Every instance of BAP will have a corresponding view, that will
-accumulate all data written by BAP. The BAP Viewer (`Ctrl-Alt-F5`)
+accumulate all data written by BAP. The BAP Viewer (`Ctrl-Shift-F5`)
 provides an easy way to switch between multiple BAP Views.
 
 Since you can run multiple instances of BAP asynchronously, it is

plugins/bap/plugins/bap_trace.py

@@ -402,7 +402,10 @@ def location(self):
             if self.level == 2:
                 top = index_up(self.index, 1)
             location_id = self.incident.locations[top.row()]
-            return self.model.locations[location_id]
+            if self.model.locations is None:
+                return None
+            else:
+                return self.model.locations.get(location_id)
 
     @property
     def point(self):
@@ -523,7 +526,7 @@ def number_of_locations(msg):
 
 @defmethod('row-count', level=1, column=0)
 def backtrace_length(msg):
-    return len(msg.location)
+    return 0 if msg.location is None else len(msg.location)
 
 
 class Incident(object):

plugins/plugin_loader_bap.py

@@ -29,7 +29,7 @@ def init(self):
             path = os.path.join(plugin_path, plugin)
             if not plugin.endswith('.py') or plugin.startswith('__'):
                 continue  # Skip non-plugins
-            idc.Message('BAP> Loading {}\n'.format(plugin))
+            idaapi.msg('BAP> Loading {}\n'.format(plugin))
             self.plugins.append(idaapi.load_plugin(path))
         return idaapi.PLUGIN_KEEP